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/*****************************************************************
|
| AP4 - Movie
|
| Copyright 2002-2008 Axiomatic Systems, LLC
|
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL is free software; you can redistribute it and/or modify
| it under the terms of the GNU General Public License as published by
| the Free Software Foundation; either version 2, or (at your option)
| any later version.
|
| Bento4|GPL is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
| GNU General Public License for more details.
|
| You should have received a copy of the GNU General Public License
| along with Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Ap4File.h"
#include "Ap4Atom.h"
#include "Ap4TrakAtom.h"
#include "Ap4PsshAtom.h"
#include "Ap4MoovAtom.h"
#include "Ap4MvhdAtom.h"
#include "Ap4AtomFactory.h"
#include "Ap4Movie.h"
#include "Ap4MetaData.h"
/*----------------------------------------------------------------------
| AP4_TrackFinderById
+---------------------------------------------------------------------*/
class AP4_TrackFinderById : public AP4_List<AP4_Track>::Item::Finder
{
public:
AP4_TrackFinderById(AP4_UI32 track_id) : m_TrackId(track_id) {}
AP4_Result Test(AP4_Track* track) const {
return track->GetId() == m_TrackId ? AP4_SUCCESS : AP4_FAILURE;
}
private:
AP4_UI32 m_TrackId;
};
/*----------------------------------------------------------------------
| AP4_TrackFinderByType
+---------------------------------------------------------------------*/
class AP4_TrackFinderByType : public AP4_List<AP4_Track>::Item::Finder
{
public:
AP4_TrackFinderByType(AP4_Track::Type type, AP4_Ordinal index = 0) :
m_Type(type), m_Index(index) {}
AP4_Result Test(AP4_Track* track) const {
if (track->GetType() == m_Type && m_Index-- == 0) {
return AP4_SUCCESS;
} else {
return AP4_FAILURE;
}
}
private:
AP4_Track::Type m_Type;
mutable AP4_Ordinal m_Index;
};
/*----------------------------------------------------------------------
| AP4_Movie::AP4_Movie
+---------------------------------------------------------------------*/
AP4_Movie::AP4_Movie(AP4_UI32 time_scale,
AP4_UI64 duration,
AP4_UI64 creation_time,
AP4_UI64 modification_time) :
m_MoovAtomIsOwned(true)
{
m_MoovAtom = new AP4_MoovAtom();
m_MvhdAtom = new AP4_MvhdAtom(creation_time,
modification_time,
time_scale,
duration,
0x00010000,
0x0100);
m_MoovAtom->AddChild(m_MvhdAtom);
}
/*----------------------------------------------------------------------
| AP4_Movie::AP4_Moovie
+---------------------------------------------------------------------*/
AP4_Movie::AP4_Movie(AP4_MoovAtom* moov, AP4_ByteStream& sample_stream, bool transfer_moov_ownership) :
m_MoovAtom(moov),
m_MoovAtomIsOwned(transfer_moov_ownership)
{
// ignore null atoms
if (moov == NULL) return;
// get the time scale
AP4_UI32 time_scale;
m_MvhdAtom = AP4_DYNAMIC_CAST(AP4_MvhdAtom, moov->GetChild(AP4_ATOM_TYPE_MVHD));
if (m_MvhdAtom) {
time_scale = m_MvhdAtom->GetTimeScale();
} else {
time_scale = 0;
}
// get the pssh atoms
AP4_List<AP4_PsshAtom>* pssh_atoms;
pssh_atoms = &moov->GetPsshAtoms();
AP4_List<AP4_PsshAtom>::Item* pssh_item = pssh_atoms->FirstItem();
while (pssh_item) {
m_PsshAtoms.Append(*pssh_item->GetData());
pssh_item = pssh_item->GetNext();
}
// get all tracks
AP4_List<AP4_TrakAtom>* trak_atoms;
trak_atoms = &moov->GetTrakAtoms();
AP4_List<AP4_TrakAtom>::Item* item = trak_atoms->FirstItem();
while (item) {
AP4_Track* track = new AP4_Track(*item->GetData(),
sample_stream,
time_scale);
m_Tracks.Add(track);
item = item->GetNext();
}
}
/*----------------------------------------------------------------------
| AP4_Movie::~AP4_Movie
+---------------------------------------------------------------------*/
AP4_Movie::~AP4_Movie()
{
m_Tracks.DeleteReferences();
if (m_MoovAtomIsOwned) delete m_MoovAtom;
}
/*----------------------------------------------------------------------
| AP4_Movie::Inspect
+---------------------------------------------------------------------*/
AP4_Result
AP4_Movie::Inspect(AP4_AtomInspector& inspector)
{
// dump the moov atom
return m_MoovAtom->Inspect(inspector);
}
/*----------------------------------------------------------------------
| AP4_Movie::GetTrack
+---------------------------------------------------------------------*/
AP4_Track*
AP4_Movie::GetTrack(AP4_UI32 track_id)
{
AP4_Track* track = NULL;
if (AP4_SUCCEEDED(m_Tracks.Find(AP4_TrackFinderById(track_id), track))) {
return track;
} else {
return NULL;
}
}
/*----------------------------------------------------------------------
| AP4_Movie::GetTrack
+---------------------------------------------------------------------*/
AP4_Track*
AP4_Movie::GetTrack(AP4_Track::Type track_type, AP4_Ordinal index)
{
AP4_Track* track = NULL;
if (AP4_SUCCEEDED(m_Tracks.Find(AP4_TrackFinderByType(track_type, index), track))) {
return track;
} else {
return NULL;
}
}
/*----------------------------------------------------------------------
| AP4_Movie::AddTrack
+---------------------------------------------------------------------*/
AP4_Result
AP4_Movie::AddTrack(AP4_Track* track)
{
// assign an ID to the track unless it already has one
if (track->GetId() == 0) {
track->SetId(m_Tracks.ItemCount()+1);
}
// if we don't have a time scale, use the one from the track
if (m_MvhdAtom->GetTimeScale() == 0) {
m_MvhdAtom->SetTimeScale(track->GetMediaTimeScale());
}
// adjust the parent time scale of the track
track->SetMovieTimeScale(m_MvhdAtom->GetTimeScale());
// update the movie duration
if (m_MvhdAtom->GetDuration() < track->GetDuration()) {
m_MvhdAtom->SetDuration(track->GetDuration());
}
// attach the track as a child
track->Attach(m_MoovAtom);
m_Tracks.Add(track);
return AP4_SUCCESS;
}
/*----------------------------------------------------------------------
| AP4_Movie::GetTimeScale
+---------------------------------------------------------------------*/
AP4_UI32
AP4_Movie::GetTimeScale()
{
if (m_MvhdAtom) {
return m_MvhdAtom->GetTimeScale();
} else {
return 0;
}
}
/*----------------------------------------------------------------------
| AP4_Movie::GetDuration
+---------------------------------------------------------------------*/
AP4_UI64
AP4_Movie::GetDuration()
{
if (m_MvhdAtom) {
return m_MvhdAtom->GetDuration();
} else {
return 0;
}
}
/*----------------------------------------------------------------------
| AP4_Movie::GetDurationMs
+---------------------------------------------------------------------*/
AP4_UI32
AP4_Movie::GetDurationMs()
{
if (m_MvhdAtom) {
return m_MvhdAtom->GetDurationMs();
} else {
return 0;
}
}
/*----------------------------------------------------------------------
| AP4_Movie::HasFragments
+---------------------------------------------------------------------*/
bool
AP4_Movie::HasFragments()
{
if (m_MoovAtom == NULL) return false;
if (m_MoovAtom->GetChild(AP4_ATOM_TYPE_MVEX)) {
return true;
} else {
return false;
}
}
|